Concept:The underlined vowel sound in the question is the short /ʊ/ sound, as found in "foot".Explanation:Option A: "cold" is pronounced with the diphthong /əʊ/ or /oʊ/, not /ʊ/.Option B: "cod" contains the short vowel /ɒ/.Option C: "pull" is pronounced /pʊl/ and has the required /ʊ/ sound.Option D: "cool" contains the long vowel /uː/, which is different from /ʊ/.Only "pull" shares the same vowel sound as the underlined letters.Answer:C. pull